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The Change in Dimension of the Masseter Muscle in Rabbits After Radiofrequency Therapy

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Song, Kyung-Ho; Kim, Myung-Hee; Jung, Jin-Won; Kim, An-Sook; Hong, Sam-Pyo; Kim, Seong-Gon

Issue Date
WB Saunders
J Oral Maxillofac Surg 67:485, 2009
Purpose: The objective of this study was to evaluate the change in muscle dimension after administering
radiofrequency (RF) therapy.
Materials and Methods: This study used 6 male New Zealand rabbits. Groups were divided by
number of applications of RF (eg, 1 to 4 points). The dimension of the masseter muscle was measured
using a computerized tomogram scan before operation, and at 1, 2, 3, and 4 weeks after RF therapy was
administered under the same conditions. Two horizontal cuts were selected for measurement.
Results: The size of the measured areas for each group at 1 week after RF therapy was significantly
increased compared with the preoperative value (P .05). When the measurements of each group at 3
and 4 weeks after RF therapy were compared with the preoperative value, they were significantly
decreased (P .05). The dimensional change was significantly different among groups at 1 and 3 weeks
post RF therapy (P .05). The swelling at 1 week after RF therapy was increased in terms of the number
of RF applications. The ratio of dimension was decreased at 3 weeks after RF therapy in terms of the
number of RF applications.
Conclusion: There was an increase in muscle dimension because of swelling in the early stages of RF
therapy. However, this dimension decreased at 3 weeks post-RF administration compared with the
preoperative value. Therefore, it can be concluded that the change in the masseter muscle dimension
was dependent on the number of RF applications.
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